<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Error404</title>
    <style>
        div{
            border: solid;
            background-color: moccasin;
            border-bottom: lavender;
            border-top: lawngreen;
        }
    </style>
</head>
<body>
<div>有毒 有毒</div>
</body>
</html>